- •Робочий зошит
- •Херсон – 2012
- •Розведення сільськогосподарських тварин
- •Завдання 1. Вивчення статей сільськогосподарських тварин Статі молочної корови
- •IV. Продуктивність сільськогосподарських тварин.
- •Завдання ___.
- •Завдання ___.
- •Тема: Методи визначення постійності лактації
- •Забійна маса свиней
- •Забійна маса птиці
- •IV. Відбір сільськогосподарських тварин
- •Складання родоводів
- •"Екстер’єр, конституція с.-г. Тварин"
- •"Індивідуальний розвиток сільськогосподарських тварин. Продуктивність і методи обліку продуктивності тварин."
- •"Відбір і підбір с.-г. Тварин"
- •"Підбір і методи розведення с.-г. Тварин"
IV. Відбір сільськогосподарських тварин
Тема: Генетичні параметри відбору.
Популяційно генетичні параметри |
Позначення |
Бажаний рівень параметрів для селекційної роботи |
Спадковість |
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Мінливість |
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Повторююмість |
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Селекційний диференціал |
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Препотентність |
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Кореляція ознак |
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Коефіцієнт гомозиготності (гібридизація) |
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Ефект селекції |
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Регресія |
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Генетична подібність |
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ВИЗНАЧЕННЯ СЕЛЕКЦІЙНОГО ДЕФЕРЕНЦІАЛУ Й ЕФЕКТУ СЕЛЕКЦІЇ
Інтервал між поколіннями, років
Вид тварин |
За Й. Йогансеном (1949) |
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Батьківське (батько-син) |
Материнське (мати-нащадок) |
У середньому |
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Коні |
9,5 |
8,9 |
9,3 |
Молочна худоба |
4,6 |
6,0 |
5,3 |
Вівці |
3,6 |
4,3 |
3,9 |
Свині |
2,4 |
3,0 |
2,7 |
кури |
1,0 |
1,5 |
1,3 |
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Заняття 2.
Задача_______________________________________________________________________________________________________________________________
Мл. |
Д от л. м. |
М х. |
Д от х.м. |
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Мл. |
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Заняття 3.
Тема: Повторюваність ознак.
Повторюваність ознак – ступінь збігу повторних оцінок наведеної ознаки.
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Завдання.
Визначити вікову повторюваність плідності свиноматок у стаді за формулою Спірмана
№ свиноматки |
Кількість поросят у гнізді |
Ранги |
d (X-У) |
d 2 (X-У)2 |
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І опорос, Х |
ІІ опорос, У |
І опорос, Х |
ІІ опорос, У |
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____________________________________________________________________________________________________________________________________Висновки:_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Завдання:______________________________________________________________________________________________________________________________________________________________________________________________
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____________________________________________________________________________________________________________________________________Висновки:___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
ТЕМА: ОЦІНКА ПЛЕМІННИХ ЯКОСТЕЙ ТВАРИН